package com.garz.utill;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

public class ImgUtil {
	/**
	 * @Description: 将base64编码字符串转换为图片
	 * @Author: 
	 * @CreateTime: 
	 * @param imgStr base64编码字符串
	 * @param path 图片路径-具体到文件
	 * @return
	*/
	public static Boolean generateImage(String imgStr, String path) {
		if(imgStr==null || "".equals(imgStr)) {
			return false;
		}else {
			BASE64Decoder decoder = new BASE64Decoder();			
			try {
				byte[] b = decoder.decodeBuffer(imgStr);
				// 处理数据
				for (int i = 0; i < b.length; i++) {
					if(b[i] < 0) {
						b[i] += 256;
					}
				}
				OutputStream out = new FileOutputStream(path);
				out.write(b);
				out.flush();
				out.close();
				return true;
			} catch (IOException e) {				
				e.printStackTrace();
				return false;
			}
		}		
	}


	/**
	 * @Description: 根据图片地址转换为base64编码字符串
	 * @Author: 
	 * @CreateTime: 
	 * @return
	 */
	public static String getImageStr(String imgFile) {
	    InputStream inputStream = null;
	    byte[] data = null;
	    try {
	        inputStream = new FileInputStream(imgFile);
	        data = new byte[inputStream.available()];
	        inputStream.read(data);
	        inputStream.close();
	    } catch (IOException e) {
	        e.printStackTrace();
	    }
	    // 加密
	    BASE64Encoder encoder = new BASE64Encoder();
	    return encoder.encode(data);
	}
	/**
	 * 示例
	 */
	public static void main(String[] args) {
	    String strImg = getImageStr("C:\\Users\\Administrator\\Desktop\\20170209145440283.jpg");
	    System.out.println(strImg.length());
	    //generateImage(strImg, "D:/86619-107.jpg");
	}
}
